Area and Circumference of Circles

Front

If my diameter is 19 inches, what is my radius?

Back

9.5 inches

Answer explanation

Front

If my radius is 10ft, what is my diameter?

Back

20ft

Front

Circumference of a circle with radius 12.5 mm

Back

78.5mm

Front

What is the formula for finding the circumference for a circle with just the radius?

Back

2*π*r

Front

What is the area of this circle?

Back

1385.44

Front

Does this picture show the diameter or radius of a circle?

Back

Radius

Front

Find the area of the circle

Back

254.34

Front

Area of the circle?

Back

1519.76

Front

What is the area of this circle? Options: 82.13, 78.5, 314.16, 170.12

Back

78.5

Front

Find the circumference of a circle with a radius of 13.5 mm.

Back

84.78 mm